This collection consists of the pre-1934 institutional archive of the William Andrews Clark Memorial Library and the records of its founder, William Andrews Clark, Jr. Items include correspondence, invoices, photographs, secondary source materials and other documents related to Clark, his library, and his family, friends and colleagues.

Records of the William Andrews Clark Memorial Library and the Center for 17th- and 18th-Century Studies from 1934 to the present. Subjects treated by these materials include library acquisitions, academic events, fellowships, Clark buildings and grounds, publicity and press clippings, and library reference and circulation records.